He auditioned and got a TV commercial job for Close-Up toothpaste and signed a contract with Star Magic later that year.

In 2002, Rosell was introduced as one of the leading men of Jolina Magdangal, in Star Cinema's Kung Ikaw ay Isang Panaginip.

In 2006, he was launched as a member of the all-male group Coverboys with Zanjoe Marudo, Jon Avila, Victor Basa, and Jake Cuenca.

[6] Rosell started getting recognition in 2010 when he played Brandon Brazil in the ABS-CBN afternoon drama Midnight Phantom opposite his close friend Denise Laurel.

[8] The team-up came to an abrupt end when Laurel took a one-year hiatus due to pregnancy, leaving Rosell to be paired up with Jodi Sta.